1. Ultra-Light & Water-Repellent Sacoche Materials & Durability: High-density, water-repellent polyester material + waterproof zippers + scratch guard processing (prevents scratches from shelves and coins). 3-layer thermal aluminum film extends cooling time, compatible with ice packs. Stores 1-1.5L, allowing for organized storage. All metal alloy zippers / rotating hooks for increased durability.

2. Multi-Functional Storage System 3-in-1 Organized Design: Functionality & Storage: 2 front and back pockets + main compartment (holds 2 smartphones / small, ultra-light folding umbrella / passport / cosmetics). 70-140cm adjustable shoulder strap & 33cm hand-carry option (instant switch for commuting, travel, and the gym). DIY customization possible (can be attached to backpacks/suitcases with included belt). Cooling function: Compatible with PCM neck coolers for heatstroke prevention. Ice packs can be used to keep jelly and snacks cool.

3. Instant Strap Detachment Design Scene Versatility: Design & Convenience: 5-second neck strap detachment (transforms into tote/shoulder bag/bag-in-bag). External flat pocket (instant access to handkerchiefs and cooling rings). Built-in summer cooling layer (prevents melting of snacks/juice/cosmetics). Ideal for: Heatstroke prevention in summer, durability during rush hour commutes, travel, and compact storage during mountain climbing.

4. Scratch Prevention Technology Commuting Rush Hour Durability: High-density nylon + water-repellent treatment (for rain/friction during congestion). 180g lightweight design (reduces burden for outdoor/everyday use). Precision stitching + thermal aluminum film inner bag (prevents loss of small items).

5. Universal Design All Ages & Scenes: Minimalist Silhouette (seamlessly fits business/casual/outdoor settings). 5 color variations: Black, Gray, Dark Blue + 2 accent colors. Cooling layer & adjustable belt for unisex design (suitable for ages 10-60s). Simple, minimalist design (matches offices/shopping/spectating). Cooling layer + adjustable belt (ideal for heatstroke prevention/cosmetic cooling). *Liquids not allowed* Recommended to use with ice packs/neck coolers.