Owner Review Therm-a-Rest ProLite 4
17th July 2008
Review | Inflating and
Deflating | General Fit and Use |
Insulation | Packing
and Storage | Repairs | Cleaning
* Reviewer Information
Name: Mark McLauchlin
Age: 30
Gender: Male
Height: 1.76 m (5’ 9”)
Weight: 80 kg (176 lb)
Email: mark at swanvalleyit.com.au
City: Perth, Western Australia
* Backpacking Background
I have been hiking since 2006 with most of my hiking consisting
of day walks averaging 16 - 22 km (10 - 14 mi) and short overnight trips where
possible.
I consider myself to be a light hiker with an average pack weight of
13 kg (29 lb).
* Product Information
Manufacturer: Therm-a-Rest / Cascade Designs, Inc
Manufacturer's Website:
www.thermarest.com
Year of Manufacture: 2006
Country of Manufacture: United States of America
Colour: Orange
Model: Therm-a-Rest ProLite 4 Regular
MSRP: USD $94.95
Specifications
|
Manufacturer's
Specifications |
My Measured Specifications |
Weight |
680 g (24 oz) |
736 g (26 oz) |
Rolled Size |
28 x 12 cm (11 x 4.7 in) |
30 x 12 cm (11.8 x 4.7 in) |
*R-Value |
3.2 |
unable to measure |
Thickness |
3.8 cm (1.5 in) |
3.8 cm (1.5 in) |
Length |
183 cm (72 in) |
184 cm (72.5 in) |
Width |
51 cm (20 in) |
Head 51 cm (20 in) Foot 40 cm (15.5 in) |
* R-Value refers to a measurement of the insulation value based on the
mattress being fully inflated. A higher R-Value theoretically means the
mat will provide better insulation.
* Product
Description
The Therm-a-Rest ProLite 4 is the lightest and most compact
4-season mattress that Therm-a-Rest produces. It is part of their "Fast &
Light" series.
It is described as:
"Ultralight: Innovative new materials reduce weight by 25%.
Compact: Tapered ergonomic design rolls up super-small.
Nonslip: Super-grip bottom keeps mattress from slipping."
The manufacturer recommends the ProLite 4 for mountaineering, winter
camping, backpacking, and multi-day adventures.
* Field Use Locations
Western Australia is known to bushwalkers for the Bibbulmun Track
which runs from Perth to Albany (nearly 1000 km or 621 miles long).
The many tracks that lead through this area also make up most of my
walking.
The diversity of the track sections can range from well marked trails
to overgrown and sometimes more challenging tracks to navigate. Old
forest tracks and Park Ranger (Conservation and Land Management) gravel roads make up the
majority of the access points to the track.
Elevation is from sea level to 585 m (1,920 ft).
The ProLite 4 has been used mainly around the Bibbulmun track
as this is an area great for hiking. Walks can be from a few hours to
6 weeks to complete end-to-end. All of my walking has been on this
track and its surrounding areas.
I have completed several sections of the track at the northern-most end
and spend several days out walking per month. The layout of the tracks
means that I have been able to walk between huts which are generally
one full day's walk apart, 16 – 22 km (9.94 – 13.66 mi).
May this year I completed four days and three nights hiking covering some 70
kilometres or 43.48 miles and utilised the
mat for the duration.
* Test Conditions
As I have been testing this item of over 18 months an exact temperature, wind
and rainfall pattern is difficult to monitor myself. The details in the table
below are courtesy of the Australian Bureau of Meteorology. This
mat has been used in all
the months below.
Statistics
|
Jan
|
Feb
|
Mar
|
Apr
|
May
|
Jun
|
Jul
|
Aug
|
Sep
|
Oct
|
Nov
|
Dec
|
Annual
|
Temperature
|
Mean maximum temperature (°C)
|
30.5
|
31.1
|
29.5
|
25.6
|
22.3
|
19.3
|
18.4
|
18.7
|
20.1
|
22.8
|
26.4
|
28.7
|
24.4
|
Mean minimum temperature (°C)
|
17.7
|
17.9
|
16.4
|
13.6
|
10.7
|
8.5
|
7.9
|
8.1
|
9.5
|
11.1
|
14.2
|
16.2
|
12.6
|
Rainfall
|
Mean rainfall (mm)
|
17.6
|
9.1
|
21.1
|
31.1
|
91.5
|
134.3
|
151.3
|
134.9
|
90.1
|
43.4
|
19.7
|
6.1
|
747.9
|
Decile 5 (median) rainfall (mm)
|
1.8
|
3.5
|
9.2
|
27.0
|
93.4
|
123.2
|
137.6
|
130.8
|
91.0
|
41.9
|
17.8
|
4.8
|
741.2
|
Mean number of days of rain ≥ 1 mm
|
1.4
|
1.1
|
2.8
|
4.5
|
9.2
|
12.9
|
14.7
|
13.7
|
10.9
|
5.5
|
3.8
|
1.9
|
82.4
|
* Review
The Therm-a-Rest Prolite 4 was the first piece of gear I
purchased when I started overnight backpacking in 2006. It has
accompanied me on approximately twenty nights.
The upper side (orange colour) of the mattress material is made from
100% polyester and the underside (black colour) is 100% nylon.
Internally the mat is made from a diamond cut 100% polyurethane
foam.
Inflating and Deflating
I have been a little disappointed with the self-inflating
properties of the mat as it takes over five hours to be at point
where I consider it to be fully-inflated and ready to sleep on. Each
time I have used this mat over the past two years I have
resorted to inflating it by blowing into the plastic valve which does not
take too much time nor is a big effort. There are no listed
inflation times on the manufacturer's website.
The valve is designed to be opened by turning anti-clockwise and
closed by turning clockwise. It also has a feature whereby once
opened it can be pulled out slightly for manual inflation, then
between breaths you simply push it back in (no need for turning) to
avoid air loss.
The mat is easily deflated by opening the valve and forcing the air
out by compression. The method I use is to open the valve, fold the
mat in half length wise then starting at the foot end of the mat I
roll it up applying downward pressure, with my knees and hands, to force the air out. Once I
have rolled the mat all the way up the valve can be closed whilst
still applying pressure so air does not enter back into the mat due
to the lower pressure now existing inside. When the mat is fully
deflated and rolled up it can then be stored in a stuff sack. No
stuff sacks are supplied with the mat however Therm-a-Rest does have
specifically designed sacks for each model of mat.
General Fit and Use
Below I have included an image of the fully inflated
Therm-a-Rest with my Mountain Designs down sleeping bag to provide a
view as to how the mat is used and the general fit a regular sized
sleeping bag has with at regular sized mat.
You might notice that the ends of the sleeping bag hang slightly
over the mat, however this does not create any issues for me as my
feet do not reach the end of the sleeping bag, nor do they hang over
the end of the mat.
I have found the mat to be very comfortable and provides good
cushionin. At no time do I feel that my hips or shoulders are
touching the ground. The 3.8 cm or 1.5 in thickness is definitely an
advantage.
The non-slip properties of the top side of the mat are great and I
do not slip around much at all, however it is worth noting that the
underside does seem to move around quite a lot which does become
annoying.
Generally when camping my mat is either on a Tyvek ground sheet or
in a tent with a silnylon tubbed floor, I have issues with the mat
slipping on both scenarios. To combat this in my tent
I have drawn lines on the floor with
seam sealer and so far this has proven to be quite effective.
Insulation
I have found the Therm-a-Rest to provide excellent insulation
whilst sleeping in a tent or on the solid floors of the three sided
huts along the Bibbulmun track. Unfortunately I do not have a device
for recording the exact temperatures on my hiking trips, however I
was luckily enough to be out one night with someone that was able to
record a minimum temperature of 3 C (37.4 F). This
was perhaps one of the coldest nights I have experienced and found
that the mat did provide me with some extra insulation from the ground
inside the hut at the campsite.
Packing and Storage
The manufacturer recommends that the mattress be stored unrolled
with the valve open, i.e. inflated with valve open. This is due to
the foam remembering the shape it holds most and will also aid in
the self-inflating process. The mat should also be stored dry to
avoid mildew damage.
My mat has never been stored in this manner simply due to the
lack of space, it is stored rolled up in a stuff sack with the valve
closed. Most people choose to store the mat under the bed however
this has
not been an option for me. I would like to note that I do not
believe this is causing the issue I have with the self-inflation
time as this has been a problem since first purchased.
Repairs
I am both surprised and impressed by the amount of information
on the manufacturer's website regarding how to find a leak and repair
it. This shows that Therm-a-Rest is well aware of the environments
people use their gear in. They want to make sure people are able to
care for their mattress.
When attempting to find the source of an air leak it is
suggested the mat be inflated as much as
possible then close off the valve. Fold the mat in half or thirds to
increase the pressure, then immerse in water. Look for a stream of
bubbles and this is where the hole is.
No repair pack was supplied, so the products the manufacturer
recommends for repairs might not be available in all countries. Some
suggestions are HotBond, SeamGrip, AquaSeal and the glue that comes
with a bicycle tube repair kit together with a patch if the hole is
large.
When out in the wilderness and repairs are needed some
suggestions from the Therm-a-Rest website are, duct tape (not for
long periods of time as the sticky residue will make permanent
repairs difficult), self-adhesive ripstop nylon repair tape or yet
again the bicycle tube repair kit.
I have to admit that I do not carry any repair kit for my mattress
nor have I ever had the need to make any repairs to it. I will
however be looking to carry something in the future.
Cleaning
The manufacturer's website suggests that the mat should be
cleaned with Formula 409 or a household cleaner. They also suggest
the use of soap and water
in the field, remembering to close the valve to avoid water
entering.
I have only ever cleaned the mat with warm soapy water and a
cloth or non-abrasive sponge. To date my mat looks as though it were
brand new as it is cleaned after most trips.
* Conclusion
This is a mat that I will continue to take hiking with me
as I really enjoy sleeping out in the wilderness. This provides
me with great comfort making it just that much better.
I would like to
evaluate the smaller 3/4 length pads in an effort to reduce weight.
*Pros Comfortable, provides
good insulation.
*Cons
Little heavy, self inflation takes too long, mat slips
around.
Read more reviews of Therm-A-Rest gear
Read more gear reviews by Mark McLauchlin
|