Thermarest Prolite Apex

Thermarest Prolite Apex

Lightweight and packable self-inflating mattress provides best in class warmth and comfort during backpacking and camping adventures in the backcountry.

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The opinion of Aventure Nordique

The Prolite Apex by Thermarest is a self-inflating, insulating and lightweight mattress. The technologies used give it an excellent comfort and good stability while taking up a reduced space in the backpack.

The StrataCore structure consists of alternating layers of thermal foam and air layers (pneumatic tubes). This design offers many advantages:

  • Better heat/weight ratio of the mattress than a traditional self-inflator.

  • Interior made of self-inflating foam; only a few breaths are then needed to achieve the desired firmness.

  • Customizable thickness of 5 cm with efficient insulation, R-Value of 3.8, with the new ASTM F3340-18 standard.

  • Foam design more durable and reliable than an inflatable mattress.

  • It is equipped with the latest Thermarest valve. The WingLock valve allows for faster inflation and deflation. It has a non-return valve that prevents air from escaping during inflation.

The Apex is the warmest, thickest and most comfortable mattress in the Prolite range while maintaining the same weight!

Technical details

Manufacturer Therm-A-Rest
Product name Prolite Apex
Season 3 season
Type Self-inflating
Form Mummy
R-Value 3.8
Material Poly Mini Hex 50D
Colour Rouge
Length R : 183 cm - RW : 183 cm - L : 196 cm
Width R : 51 cm - RW : 64 cm - L : 64 cm
Thickness 5 cm
Folded R : 28 x 12 cm - RW : 33 x 13 cm - L : 28 x 17 cm
Weight R : 620 g - R : 790 g - L : 850 g
Accessories Storage bag
Warranty Lifetime
Country of Manufacture Ireland


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