Marmot Trestles 15 Cold-Weather Mummy Sleeping Bag Review 2019

Marmot Trestles 15 Cold-Weather Mummy Sleeping Bag has been designed to cater to the needs of a select group of individuals. Who are we talking about? People who often find themselves on an outdoor adventure in a particularly cold, damp environment. These people are the target demographic for this sleeping bag. Marmot believes its offering serves these people exceptionally well. Is that the case? Let us see for ourselves.

Features of the Marmot Trestles 15 Hiking Sleeping Bag

Let’s address the elephant in the room: How effective is the insulation of this bag? In short, very effective. The insulation in question is provided by an artificially created SpiraFil High-Loft Insulation system. Marmot claims that its SpiraFil High Loft insulation more than guarantees the warmth retention and cold resistance in temperatures as low as 15 Degree Fahrenheit. And we have to say that Marmot Trestles 15 does what it claims.

In addition to being extremely well insulated, the SpiraFil High Loft is also quite effective against moisture. Where other sleeping bags become lose and lose their loft, SpiraFil remains sturdy and provides added protection against moisture in damp conditions.

Marmot Trestles 15 is built using Combination Wave Construction. This type of construction introduces a dual layer design where the upper part has excellent heat retention thanks to the loft and the bottom part has added comfort through the use of a plush, blanket-like material.

Protection against the cold isn’t this bags only strong point. The Trestles 15 also has a Full-length, YKK two-way zipper that can also be locked in place. Furthermore, there is a secondary zipper providing much-needed ventilation for when the weather gets hot. So no matter the season, Trestle 15 has you covered.

When it comes to the available room, the Mummy style design may seem counterintuitive but it works just as well if not better, like the other designs. Marmot has also paid attention to the foot room. The Trapezoidal Foot Box it includes, takes the comfort level of this sleeping bag up a notch.

Unfortunately, there is only one color on offer here priced above $200.


  • Excellent protection against the cold
  • Very portable thanks to the compression stuff sack
  • Dual layer construction
  • Effective ventilation
  • Trapezoidal Foot Box ensures you can wiggle your toes as much as you want
  • Provides protection against moisture


  • Price is a bit steep
  • Not fully waterproof but is moisture proof

Marmot Trestles 15 is every bit as warm as it claims to be. If you are looking to buy a sleeping bag for use in colder conditions, look no further than this.