I used the Spark SP-1 Sleeping Bag on GW weekend at Motosuko and could not sleep at all due to the extreme cold. Had to cut the trip short. Disappointed in the overly optimistic temperature rating.

Extrem schlechtes Material!

70 ish retired Vet, 2k mile AT solo section hiker who is very load conscious. For non-winter hikes, I replaced my favorite, 10 yr old Sierra Designs Ultralumina with this product. Reduced sleep system by 1lb without loss of comfort/warmth. This product gives me better capability to complete long hikes as I am experiencing getting older/facing reality about aging. Good value, imo.

Je cherchais un sac de couchage permettant une température de confort autour de 10°C et le plus compact possible pour mes sorties de bike packing ultralight estivale.Ce sac de couchage rempli tous les critères du cahier des charges, je le conseille sans réserve.

軽いのでリュックに入れても嵩張らない！そして軽い！寒い時はこれより薄手の同ブランドの寝袋をレイヤー使いしています。