Targeted passive cooling. The first-drop offer is deliberately simple: one 100% merino wool cooling boxer with a centred merino-wool sleeve and natural-rubber waistband, plus two reusable cooling inserts. Load a fully solid insert into the centred merino-wool sleeve. As it absorbs body heat, the insert gradually softens while buffering warmth. 1 × 100% merino wool cooling boxer with a centred merino-wool sleeve 1 × natural-rubber waistband, built into the boxer 2 × reusable cooling inserts No cracking, water or loose ice Remove the insert when cooling subsides. Reuse it only after it has fully solidified again. Exact reset conditions and timing will be supplied with the production product. No case, guide, or extra accessories are included. Preorder: We are targeting dispatch by 30 September 2026, subject to final production confirmation. We will update customers as each production milestone is confirmed. Cancel for a full refund any time before fulfilment. Founder working specification, subject to the final signed factory BOM, insert technical specification and production-matched sample. NUMBNUTS is a thermal-comfort product, not a medical device. Use only as directed. Never place an insert directly on skin or sleep while using it. Final supplier-approved reset, safety and care instructions will be provided with the production product.
