Sitka Core Merino 330 Zip-Off Bottom
by Sitka
$159.00
Last Updated: Tuesday, April 7th, 2026
Designed to accommodate layering for more versatility from early to late-season climates. Heading into the backcountry late in the season calls for the heavyweight warmth of the Core Merino 330 Zip-Off Bottom. Sitka&';s heaviest-weight merino wool blend keeps you warm on the coldest hunts of the year and regulates temperature to maintain comfort when you&';re on the move. Merino wool is also naturally odor-resistant to minimize smell on extended trips, and their ArmorSpun merino wool is reinforced for superior durability. Sitka then added a recycled synthetic lining quickly moves sweat away from your skin to keep you dry and warm. And when you need to shed a layer, side zips let you remove this bottom without taking your boots off, making this baselayer ideal for long expeditions and shifting weather conditions. Sizing MEN&';S SIZING GUIDE SIZE WAIST REG TALL Small 30" 31" 33" Medium 32" 31" 33" Large 34" 32" 34" X-Large 36" 32" 34" XX-Large 42" 32" 34" XXX-Large 46" 32" 34" How to Take Your Measurements WAIST MEASUREMENT Measure around where you normally wear your pants, keeping the tape measure a bit loose or putting one finger between your body and the tape measure. INSEAM MEASUREMENT In a standing position, measure from your crotch to where you want your pants to end, breaking at the top of the shoe in the front and just above the heel in the back. Specs Weight 9.8 oz Material Merino Wool, Nylon ArmorSpun blend, and a synthetic liner Manufacturer Warranty Warrantied against manufacturer defects