Womens Hot Sulphur Belay Jacket M - Chile Pepper/Syrah. The Women's Hot Sulphur Belay jacket is insulated with 120g of Pinneco Core⢠fill in the body and 80g in the sleeves; creating a super warm yet highly functional and agile cold weather piece. Pair with your coziest layers and you'll stay toasty on those frigid mornings when you wake up to snow on the tent. Bottom line: itâs really warm.