The board.

10mm is the universal sadhu-board spacing — wide enough to be felt, narrow enough to survive your first day. We ship 10mm so the same board works in your first week and in your fifteenth year.

Two boards let you stand with one foot on each — the traditional position. You can also work asymmetrically, hold one in your hand, or use them hinged. Every order ships as a pair.

Anyone pregnant or menstruating, or with a heart or circulatory condition, a clotting disorder, epilepsy, peripheral neuropathy, thrombophlebitis, open foot wounds, recent foot tattoos, or a fever. When in doubt, ask your doctor before starting.

Next business day from Los Angeles via FedEx 2-day. A tracking number arrives the moment the package leaves. US shipping and sales tax are included in the purchase price. No signature is required on delivery.

Yes — fourteen days from delivery, full refund once the board arrives back in clean, usable condition. Return shipping is at your expense. Beyond fourteen days, any defect (warp, bad nail, transit damage) is repaired or replaced at Rebeka's cost, regardless of date.

Day fifteen. The first two weeks are socks-on so your nervous system can meet the sensation gradually. Barefoot too early is just pain — productive sensation needs nervous-system readiness, not toughness.

Intense, then surprisingly tolerable. Most people stand thirty seconds in socks on day one and feel every nail; by day five, three minutes feels normal. Step off immediately if you feel lightheaded or get a tingly numbness.

Wipe the board with a dry cloth after each session. Once a month, rub a thin layer of beeswax-and-linseed oil into the walnut and let it absorb overnight. Keep the board away from direct sun and away from radiators.