Frequently asked questions

No. You pay once. No auto-refills, no surprise charges.

Free on orders of $150 or more, and the Both Knees Kit always ships free. Otherwise it’s a flat $4.90.

Every order is tracked, and we email you the link when it ships. Estimates are in our Shipping policy.

Write to us soon. If it hasn’t shipped, we’ll change or cancel it. If it has, use your 90-night trial.

Major cards, Shop Pay, Apple Pay and Google Pay. We never see your full card number.

Yes. Try it at home for 90 nights, even used. Not in love? We email you a free label and refund you as soon as it’s scanned. How returns work

Two years. If anything stops working in normal use, the replacement ships first. No registration needed.

15 minutes of warmth, once or twice a day, while you’re awake and relaxed. Then 10 minutes of easy moves. It switches off on its own.

Warmth for stiffness and everyday aches. Cold for a fresh injury or a joint that is suddenly hot and swollen.

That’s what we made it for. Warmth eases arthritis stiffness, especially before you move, and rheumatologists recommend it for knee osteoarthritis. See the evidence

Wipe the device with a damp cloth and let it air-dry. Keep the controls dry.

For most adults with everyday aches, yes. Start on the lowest level, over clothing. Our safety guide covers special cases. Safety guide

Wait until your surgeon or physical therapist clears you. Then start on the lowest setting.

Yes. Enter their address at checkout and add a note. No prices inside. How gifting works