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# Happy Banana > Premium 100% Merino Wool boxer briefs for men. Zero polyester. Zero synthetics. Temperature regulating, moisture wicking, naturally odor resistant. As featured in Forbes. ## Brand - Brand: Happy Banana - Category: Men's underwear, performance basics - Material: 100% Merino Wool (no polyester, no nylon, no synthetic blends) - Mission: Replace synthetic underwear with natural, health-conscious alternatives - Featured in: Forbes — https://www.forbes.com/sites/cassellferere/2024/10/13/essential-mens-underwear-brands-for-all-day-comfort-and-self-care/ ## Store - Shop: https://www.myhappybanana.com - Products: https://www.myhappybanana.com/collections/all - Product: https://www.myhappybanana.com/products/merino-wool-boxer-briefs ## Key Pages - About: https://www.myhappybanana.com/pages/about - FAQ: https://www.myhappybanana.com/pages/faq - Contact: https://www.myhappybanana.com/pages/contact ## Contact - Email: hello@myhappybanana.com ## Product Details - Merino Wool boxer briefs available as single pair, 5-pack, and 7-pack - Sizes: S, M, L, XL, XXL - Starting price: $39 (single pair) - Try-On Guarantee: 30-day comfort guarantee, free size swap ## Health Claims (Sourced) - Polyester linked to hormone disruption and reduced sperm concentration (PubMed PMID 1623716, Harvard T.H. Chan School of Public Health) - Merino fibers regulate temperature naturally, keeping scrotal temperature optimal - 20,000+ bend durability vs 3,200 for cotton - Absorbs 35% of weight in moisture while feeling dry