Modibodi

A former cosmetic chemist ranks the best period swimwear of 2026 — heavy-flow, teen, budget and backup picks — and explains the "pink puddle" physics no other guide does.

A former cosmetic chemist on heavy-flow period swimwear: why no suit survives a heavy day-1 alone, the highest-capacity picks, and the disc you also need.

A former cosmetic chemist explains how period swimwear actually works underwater — why it absorbs blood but cannot keep pool water out, and what the pink puddle really is.

A former cosmetic chemist explains underswimming — layering a thin period bottom under a race suit — and ranks the lowest-drag bottoms for swim training.

An honest look at Beautikini, the budget Amazon period swimsuit brand — how its leak-proof gusset really works, who it's for (teens, light-to-moderate flow), and where it fits among the better-known options.

A materials-led deep dive into how leak-proof period swimwear actually works — the absorbent-layer science, the honest "pink-puddle" physics, and a style guide for matching silhouette and flow. Brands compared: Modibodi, WUKA, Knix, The Period Company and more.