Sea To Summit Talus TSI women's Sleeping Bag

The outer shell is Sea to Summit’s proprietary NanoShell™ which is a 20 denier high density weave nylon shell fabric treated with a DWR and a thin microporous coating. The material is 100% windproof and highly water resistant which keeps the down dry from any external water. The thin microporous coating is also highly breathable; it allows water vapour produced by your body to move freely through the fabric to the outside.

The body is made up of a differential cut shell with 3D side walls, offset baffles with 60/40 fill ratio combined with side block baffles. As well, two combined down and THERMOLITE® baffles are under the foot area which helps keep the feet area warm.

The zipper is a 2 way YKK #5 side zip. There are options for both left and right side zippers.  At the top of the zipper is a velcro closure as well as a snap button closure. There is also a small zipper pocket near the neck, big enough for a pair of earplugs or maybe a set of keys. 

The hood has two drawstrings, one for the inner neck draft tube and one for the outer hood. Having the ability to cinch down the inner neck tube is a nice feature for extra warmth and is something lacking on lighter bags such as the Mountain Hardware Phantom Spark bag. 

The Talus TSI also comes with a storage bag you can cinch and then zip up and a compression sack. 

• Outer shell: NanoShell™20 denier high density weave nylon
• Insulation: Ultra Dry Down™
• Fill Power: 750

• Relaxed mummy with anatomically tapered foot box, tailored specifically for women.
• 2D Nanoshell.
• ULTRA-DRY Down™ 750+ Loft – 90/10 Premium Duck Down.
• Differential cut shell with 3D side walls, offset baffles with 60/40 fill ratio combined with side block baffles.
• Zip draft tube with anti-snag and neck draft tube, cushioned internal hood drawcord with dual adjustment.
• 2 way YKK #5 side zip.
• Two combined down and THERMOLITE® baffles under the foot area, to help keep heels and ankles warmer where down is compressed.
• Includes light weight Ultra-Sil® compression bag and storage cell/laundry bag.
• Medium sized internal zip pocket.

When first removing the Talus TSI out of its storage sack, the high quality is easily apparent despite its somewhat plastic feel to the touch. After several nights of testing this bag is definitely on the warm side. It’s probably a little too warm for use in the summer but if you are a cold sleeper it may be fine if left unzipped partially or all the way. Breathability is excellent, never once was there a feeling of clamminess that is present with some bags. It’s not a bag for those who may not be slimly built though. Although it is billed as a roomy mummy bag it definitely felt a little tight, especially through the mid-section. Having said that, there is some flex to the material, which alleviates the coffin-like feel some mummy bags are prone to. 

Overall this is a bag that can be packed up into a fairly small package and thrown into the backpack for extended trips in damp climates. It’s Ultra Dry Down material breathes well and its neck tube and hood can be cinched down to provide extra warmth on those extra chilly nights.