8 Reasons the SIV Became Our Bestselling Crossbody
By Mick V. · Last updated November 7, 2026
TLDR: The SIV is our bestselling crossbody: 17 litres of space in a clean moon-bag shape, a zipped main compartment, water-repellent nylon, and a wide, adjustable strap that stays comfortable all day.
The SIV vs. the bags you know
The SIV vs. the bags you know
SIV
Ordinary tote bag
Backpack
1. It's a crossbody, so it doesn't slip off, and keeps your hands free
A regular tote slides off your shoulder the moment you move. The SIV's crossbody strap sits across your body and stays put, walking, cycling, or carrying groceries. Our customers voted it the #1 feature of the bag.
2. Carries your full day
The SIV holds a full day: laptop, sweater, water bottle, chargers, even a gym kit or an overnight change. 17 litres in a bag that still sits flat against your body.
Exactly what i wanted, a sling bag that could carry my working laptop, notes, headphones and so on. Becoming a father in 1 month, so i think the extra space will come in handy.
4. It zips shut
The main compartment closes with a full zipper. Nothing falls out on the bike, nothing gets grabbed on a busy tram, and everything stays where you put it.
5. Water-repellent, rain or spills
The SIV is made of water-repellent light nylon. Light rain, a spilled drink, a wet bike ride, it shrugs it off and stays light on your shoulder.
The SIV bag is very practical. It basically fits everything I need when I go for a walk, to work, or to meet friends. The workmanship is very solid. A big advantage is that it is waterproof. I definitely recommend it!
6. Two inner pockets, one zipped
Keys, phone and wallet get their own spots, with a zipped pocket for the things you really don't want to lose. Reach in, grab, done, no digging.
Good quality, perfect fit. Love the compartments inside. Great that I’m able to sling over like a messenger bag. Love the colour too.
7. A clean look that works with everything
A minimal moon-bag silhouette, worn at your side. Clean colours, no logos, no straps flapping, it fits your outfit whether you're heading to work, dinner or the weekend.
The beige SIV bag that I bought is actually a really nice bag! It fits all my university essentials (and then some), and keeps me from having a sweaty ass back in warm weather like wearing a backpack does, and it's actually quite comfortable to wear too!
8. You can try it at home for 30 days
Order it, wear it for your actual week, and if it's not the best bag you've owned: send it back. Free and easy. Over 12,400 verified customers rate our bags 4.8 out of 5.
Up to 30% Off the SIV Bag
Our bestselling crossbody: 17 litres, zipped shut, water-repellent nylon, and a wide adjustable strap, in one clean, minimal bag.
Sell-out risk: HIGH | FREE shipping over €70
What customers say
Best Sling bag ive ever purchased.
Really well made, easy to sling over my head for the cross body, hands free. And capacious. Am going to try it on a flight, not just the weekend grocery/markets shopping. Delivery was fast and efficient.
Absolutely love the black SIV bag, it’s the best bag I’ve ever bought!!
I recently picked up the SIV, and it strikes a great balance between practicality and understated style. The material is durable yet lightweight, and the compartments inside are thoughtfully laid out.
Frequently asked questions
What if it's not for me?
You get a 30-day home trial. Wear it for your normal week (commute, work, groceries, gym) and if it's not for you, returns are easy.
How much fits in the SIV?
17 litres: laptop, sweater, water bottle, chargers, even an extra pair of shoes or a gym kit. Dimensions: 60 x 36 x 10 cm.
Is the strap adjustable?
Yes, up to 100 cm, and it's 5 cm wide so it spreads the weight instead of cutting into your shoulder. Wear it high, low, or anywhere in between.
Is it really water-repellent?
Yes. The SIV is made of water-repellent light nylon that handles light rain and everyday spills. It's better not to wash it, and never in the machine: a soft damp cloth keeps it clean. If you really want to, wash it by hand.
How sturdy is it?
Tough nylon with reinforced stitching that holds its shape, packed full or traveling light. Our bags are rated 4.8/5 by 12,400+ verified customers, and if anything is ever wrong, our support team sorts it out.
How fast is delivery?
In EU: order before 22:00 and it's shipped the same day. Shipping is free on orders over €70.
Does it close?
Yes, the main compartment zips fully shut, and one of the two inner pockets has its own zipper for valuables.
