Mate Mono Horn Bag, Collapsible Seamless Knit Clutch

A clutch knitted in one seamless piece: flat and square when folded, a bright diamond when you carry it. Made in Japan by Mate Mono.

The Horn Bag is made without a single cut. A special knitting machine forms the whole bag in one piece from Komatsu Matere’s own processed yarn, then the finished bag is dyed, a process that shrinks the knit and gives it a dense, springy texture and bright color. Because nothing is cut away, nothing is wasted. Folded, it is a flat square that slips into a suitcase; carried by its handle, it opens into a diamond. It is just right for a wallet and phone on short outings. About 10.24″ × 10.24″.

Specifications

• Brand: Mate Mono by Komatsu Matere (Ishikawa, Japan)
• Model: Horn Bag
• Type: Collapsible clutch with handle, seamless 3D knit
• Colors: Dark Green, Green, Yellow
• Dimensions: 10.24″ × 10.24″
• Material: 93% nylon, 7% polyurethane
• Construction: Knitted in one piece, then product-dyed; no cutting waste
• Use: Avoid localized pressure
• Made in: Japan
• Item numbers (MPN): MM-Horn-DG (Dark Green), MM-Horn-VG (Green), MM-Horn-YE (Yellow)

Features

• Seamless 3D knit: no cutting, no fabric waste
• Product-dyed for rich color and a dense, springy texture
• Folds flat into a square; carries as a diamond
• Holds a wallet and phone
• Made in Japan

Best for

Quick errands, coffee runs, museum visits and travel, as a packable extra bag. More from Mate Mono: Mate Mono Lilly Bag, Self-Standing Knit Handbag, Mate Mono Shiny Shell Drawstring Crossbody Bag, Mate Mono Shiny Fold Bag, Glossy Crossbody Shoulder Bag.

Who this is not for

• Carrying heavy or sharp items: avoid localized pressure on the knit.
• Anyone who needs a closure: it is an open clutch.
• Anyone who wants identical bags: each is dyed as a finished piece, so color and size vary slightly.

Why we carry it

We’ve been curating design-led pieces since 2009, and we look for objects that are well made, honest about their materials and a pleasure to use. Mate Mono (mate-mono) is the product brand of Komatsu Matere, the textile dyeing and finishing company founded in Ishikawa, Japan, in 1943. Its idea is to waste as little material as possible: some bags are made from surplus or offcut industrial fabrics, others are knitted in one piece so nothing is cut away, and each design leans on the company’s own dyeing and finishing know-how.

Buy once: durability and care

Spot-clean with a cloth moistened only with water, using a mild dish or laundry detergent if needed. Blot the stain with a clean part of the cloth, working from the outside in, rinse with cool water and lay flat to dry. If a stain persists, submerge the bag in cool water, swish and brush lightly, rinse and lay flat to dry.

Frequently asked questions

What fits in the Mate Mono Horn Bag?

A wallet and a phone, plus small items, for short outings. It measures about 10.24″ × 10.24″.

Can the Horn Bag be folded flat?

Yes. It is fully collapsible: folded it is a square, and when you hold it, it takes on a diamond shape.

What is the Horn Bag made from?

93% nylon and 7% polyurethane, knitted in one seamless piece and then dyed.

Why is the Horn Bag considered low-waste?

It is knitted directly into its shape, so there is no cutting and no leftover fabric.

How do I clean the Horn Bag?

Spot-clean with a damp cloth and mild detergent, rinse with cool water and lay flat to dry.

Which Horn Bag color is best for summer? (our styling advice)

Yellow and Green are bright and fresh with white and denim; Dark Green is easier with darker winter outfits.

Trade pricing for design professionals

Buying for a boutique, a museum shop, a hotel or a corporate gift program? Interior designers, architects, contractors and corporate buyers can apply to the MetropolitanDecor Trade Program for trade pricing on Mate Mono and the rest of our catalog, with a dedicated trade support line. Applying takes about three minutes, and our trade team reviews every application personally, usually within one business day.

Shipping & returns

Ships in 2–3 business days. Orders over $100 ship free by ground to the 48 contiguous states. All sales are final, so check the size and specifications above before ordering; if your order arrives damaged or isn’t what you ordered, contact us within 48 hours of delivery with photos and we’ll make it right.

Please note: Because this item is made to order or specially sourced, it is final sale.