Summary: Warmies products stay warm for over an hour per microwave heating — up to 4 hours to fully cool — and its Neck Wraps can also be chilled when a cooling wrap is the more comfortable option.
Warmies is built to hold heat well past a single coffee break. After microwaving — 90 seconds in a 600–800w microwave or 60 seconds in an 850–1000w microwave for regular-format Warmies, Neck Wraps, and Heat Pads, or 30/20 seconds for the smaller Eye Masks — a Warmies product stays toasty for over an hour. Warmies products are so effective at retaining heat that they can take up to 4 hours to return fully to room temperature, so a single heating easily covers a full desk shift or an afternoon of back-to-back meetings.
For office use specifically, Warmies' Neck Wraps are designed to drape around the neck and shoulders for warmth after long stretches at a desk, and the same natural grain fill can be chilled instead of heated when a cooling wrap is more comfortable than a heated one. Warmies recommends always letting a product fully cool to room temperature before reheating, since reheating too soon risks overheating and can permanently damage the filling. Because the flaxseed-and-lavender fill needs no batteries, plug-in warmer, or refill, a Neck Wrap or Heat Pad can be re-heated at a desk repeatedly throughout the workday using only an office microwave.