How to Clean a Therm-a-Rest Sleeping Pad

Step-by-step instructions

Step 1: Identify the pad and close every valve

Check the model, fabric, valve type, and any built-in pump or wing-lock assembly. Remove detachable electronics and follow their separate instructions. Close the valve firmly before washing, as Therm-a-Rest directs, so cleaner and dirty water do not enter the interior. Do not remove a valve unless you are following a model-specific replacement procedure.

Step 2: Shake off abrasive debris

Brush away sand, pine needles, and dry soil before wetting the pad. Pay attention around valve bases and textured welds, where grit can hide. If you suspect a puncture, mark the location before cleaning, but do not confuse soap bubbles used in leak testing with a full wash. Repair work should be done on a clean, fully dry pad.

Step 3: Wash by hand in a tub or with a hose

Lay the pad in a clean tub or on a surface free of sharp objects. Therm-a-Rest recommends a hose or bathtub instead of a washing machine. Apply an approved general household cleaner to the surface and scrub gently with a soft cloth or sponge. Work in sections so liquid does not pool around the closed valve longer than necessary.

Step 4: Clean high-contact areas carefully

Give extra attention to the head and shoulder zone, side rails, underside contact points, and areas exposed to sunscreen. Use repeated light passes instead of an abrasive brush. Do not use a pressure washer, washing-machine agitator, bleach, fabric softener, or solvent over the whole pad. Strong chemicals and mechanical flexing can damage coatings, welds, and laminated layers.

Step 5: Spot-treat tree sap

Therm-a-Rest recommends a cotton rag moistened with rubbing alcohol for sap. Work only on the sticky spot, use a modest amount, and expect that a stain may remain. Afterward, a light dusting of talc or baby powder can reduce residual tack. Do not flood seams or valves with alcohol, and do not mix it with another cleaner.

Step 6: Rinse away cleaner

Rinse both sides and all textured channels with clean water while the valve remains closed. Turn the pad carefully, supporting it instead of dragging it over a tub edge or ground. Continue until the surface no longer feels slippery and runoff is clear. Check around valve shoulders and deep baffles for hidden foam.

Step 7: Air-dry both sides completely

Let water drain, wipe excess moisture with a towel, and place the pad in a shaded, ventilated area. Rotate it so the underside and folds dry. Do not use a clothes dryer, hair dryer, radiator, or prolonged intense sun. Open the valve only after the exterior around it is clean and dry, preventing rinse water from being drawn inside.

Step 8: Inspect welds, coating, and valve performance

Inflate the dry pad and look for lifting fabric, unusual bulges, delamination, a leaking valve, or air loss. Cleaning does not repair these failures. A stable dirt stain is cosmetic; a growing bubble or separated internal structure can be unsafe to patch as if it were a simple puncture. Consult Cascade Designs support for repair or warranty guidance.

Step 9: Store according to the pad type

Store only when clean and completely dry. Therm-a-Rest generally recommends self-inflating pads unrolled with the valve open, while compact air mattresses may have different storage directions. Keep the pad in a cool, dry place away from sharp objects, pets, heat, and direct sunlight, and use the exact manual when its instruction differs.