Sleep Cool. Wake Refreshed. No Electricity Needed.
Revolutionary pillows inspired by nature's coolest creature. Our hippo-red-sweat-inspired phase-change materials keep you comfortably cool for 8+ hours—no cords, no motors, no electricity bill.
You touch your pillow at 3 AM after sleeping through a 90°F night—and it still feels stone-cold on your cheek. No cords, no motors, no electricity bill. Just physics and biology working together to give you the best sleep of your life.
Modeled after hippo's natural red sweat that acts as a sunscreen and antibiotic. Our proprietary coating creates a self-regulating thermal barrier.
Advanced phase-change materials absorb and release heat precisely when needed, maintaining optimal sleeping temperature from bedtime to morning.
No noisy fans, no expensive AC, no electricity bills. Just pure physics working silently through the night to keep you comfortable.
Perfect for hot sleepers and extreme climates. Whether in Phoenix, Dubai, or Singapore, TumbleHippo keeps you cool when nothing else can.
Direct-to-consumer at $149-199 with manufacturing costs of just $45. Quality sleep shouldn't cost a fortune—or require electricity.
Kickstarter preorders coming Q2 2026. Join thousands already on the waitlist for the future of temperature-regulated sleep.