Sea to Summit Venture Women's Synthetic Sleeping Bag 23

The Sea to Summit Venture Women's Synthetic Sleeping Bag 23 is a women's-specific mummy bag with a -5 °C comfort rating tested to EN/ISO 23537 — unlike manufacturer-only figures, this is a number verified through a standardized procedure, which makes it more reliable when comparing against competing bags. The limit rating of -11 °C and extreme of -30 °C round out the range over which the bag still functions, though comfort drops off toward the lower end. Thermolite HL-1 insulation with WaveLoft™ construction is the expected trade-off of synthetic fill: unlike down, it keeps insulating when damp and tolerates rougher handling, at the cost of extra weight — 1,380 g puts this bag on the heavier side for its temperature range. The triple-zip system, full-length right side, half-length left, plus a foot zip, allows fine control over ventilation or lets the bag open flat as a quilt. The recommended maximum user height is 170 cm, worth checking for taller users. It suits three-season hiking in damp conditions, where synthetic fill's tolerance for moisture outweighs the weight savings of an equivalent down bag.