KAI S - practical compact crossbody bag that opens like a book

Meet Batohiro KAI S – the latest addition to our range of waist bags for everyday carry. Made for a dynamic lifestyle, all kinds of uses, and 3 ways to wear it.

Designed for complete visibility, extreme durability, and a clean unisex look. This isn’t just another “waist bag”; it’s your organized companion through the good times and the bad, handcrafted in the heart of Prague.

The biggest advantage of the KAI S is its construction - clear interior organization and versatile design. Forget narrow openings that you can barely get your hand through. The waist bag’s defining feature is its full-perimeter zipper - KAI S opens up completely.

With our Zipline concept, you can unzip the bag all the way, access all the organizers at once, and instantly see everything you need. Your phone, wallet, headphones, power bank, lip balm – everything has its place in a carefully designed organizer system. No more chaos.

KAI S is a haven for lovers of order. The interior and exterior are divided into several functional zones:

• In the lid: A zip pocket for all your essentials (tissues, gum), or simply things you need to have close at hand every five minutes, elastic loops for pens, cosmetics, or cables, and a flat pocket for business cards or tickets.
• Rear security pocket: On the side that sits against your body, keeping your valuables (ID, passport, phone, cash) close and secure while traveling, on vacation, or moving through the crowd at a festival or your favorite band’s concert, where an unforgettable atmosphere and a long night at the club await.
• In the main compartment: Two zippered mesh pockets let you see what’s inside at a glance, and there’s also an integrated carabiner loop for your keys.

For wearing around town, while traveling, or at festivals, you need a material that can take a beating. That’s why KAI S is made from waterproof CORDURA® 500D, a material legendary among outdoor enthusiasts for its extreme resistance to abrasion, tearing, and moisture. It doesn’t just look great—it’ll last for years, even with rough handling.

• The waist bag is fitted with high-quality water-resistant YKK® zippers that keep dust and water out.
• The straps are long and wide enough to carry your essentials.
• A sturdy, ergonomically sewn attachment point ensures maximum comfort when wearing it across your body, so it won’t dig in or get in your way.

Ways to wear it and how to use it

Thanks to its adjustable straps made from durable material and its compact size, the waist bag adapts to different situations:

·      Crossbody on your chest: The most common way to wear it. Shorten the strap so the bag sits snugly against your chest. This provides maximum security in crowds (concerts, festivals, public transit) and easy access to your essentials or phone.

·Over the shoulder: A more polished urban style. Lengthen the strap to wear the bag by your side. You can wear it casually over your shoulder like a classic handbag or small shoulder bag.

·Around your waist: A classic, movement-friendly fit. Wear it traditionally on your hips or waist to keep your hands and upper body completely free. Practical for sports, cycling, hiking, longer walks, or parents with children.

KAI S has thoughtfully designed, comfortable dimensions of 20 × 13 × 7 cm, making room for your everyday essentials — a smartphone, wallet, keys, (power bank), small personal care items, a snack, a water bottle of up to 500 ml, or your favorite beer.

KAI S proves that even a “small” waist bag can make a big difference to your everyday life. It combines careful handcraftsmanship, premium materials, and intelligent design that you’ll appreciate every time you open it all the way.

Built to Last. Be the Hiro.