3M M1370 Knitted Sleeves - Black Wool Blend Spray Treated Fineness 03 Arm Warmers Unisex Italian

The Layer Nobody Expects

A pair of chunky knitted sleeves in a wool blend, worked at fineness 03 and finished with a spray treatment that pulls depth out of the black. Worn over bare arms, under a vest, or past the cuff of a jacket. Made in Italy by LA HAINE INSIDE US, unisex, one size, the smallest piece in the wardrobe that changes the most.

Why These Knitted Sleeves Are Different

• Warmth without a layer — unlike pulling on another sweater, these heat the arms and leave the body free, so you never overheat indoors.
• Fineness 03 knit — a heavy chunky gauge with deep air pockets that hold body heat and keep a defined, sculptural line.
• 20% wool — natural insulation and breathability, blended with polyester for shape retention and durability.
• Spray treatment — applied to the finished knit, giving the black a dry, matte, weathered depth no plain dye achieves.
• Layering tool — works under short sleeves, over long ones, or extending past a jacket cuff.
• Unisex, one size — the knit stretches to sit correctly on a wide range of arm proportions.
• Turns a sleeveless piece into winter wear — the fastest way to make a vest or tank work in the cold.
• No logos — pure knit and texture, nothing to date it.
• Made in Italy — Italian knitwear construction and finishing throughout.

Specifications

• Style: Knitted sleeves / arm warmers, fineness 03, spray treated
• Color: Black
• Material: 80% polyester, 20% wool
• Features: Chunky fineness 03 knit, spray surface treatment, pull-on construction, sold as a pair
• Fit: One size, unisex
• Origin: Made in Italy
• Brand: LA HAINE INSIDE US
• Season: Fall / Winter
• Gender: Unisex
• Model: Height 190cm, chest 100cm, shoulders 48cm, waist 82cm, hips 92cm — wearing one size

Unisex Size Chart

Unisex one size — the chunky knit stretches across a wide range and relaxes with wear.

The Moment You Put It On

They pull on with resistance, then settle. The gauge is heavy enough that you feel the weight on the forearm, and the spray treatment reads darker in the stitch valleys than on the ribs, so the black shifts as your arm moves.

Then you look down and the outfit has changed. A sleeveless piece suddenly reads as winter. A short sleeve gains a second layer that stops exactly where you want it. Where a full sweater commits you to warmth everywhere, these put it only where the cold actually reaches you.

The Art of Fineness 03 Knitting

Fineness, or gauge, is the number of needles per inch on the knitting machine. Fineness 03 is very coarse: thick yarn, large stitches, and big air pockets between them. Those pockets are the insulation. The coarse gauge also gives the fabric structure, so the sleeve holds its own cylinder rather than clinging like a fine-gauge knit would.

The Art of Spray Treatment

Spray treatment is applied to the finished garment rather than the yarn, so colour settles unevenly and pools in the deepest parts of the stitch. The result is a black with visible relief and a dry, slightly aged hand. Because the finish follows each piece's own stitch structure, no two pairs come out identical, which is exactly the premium of the technique.

How to Wear It

• City winter: under a sleeveless coat or vest, the knit filling the arm where the outerwear stops.
• Daytime layering: over a fine long-sleeve knit, pushed down for a stacked, gathered cuff.
• Travel: weighs almost nothing, adds real warmth on a cold flight, packs into a coat pocket.
• Evening: over bare arms with a sleeveless black dress or tank, texture against skin.

Care Instructions

• Hand wash cold, or dry clean — the spray treatment and wool content do not tolerate hot water.
• Do not machine wash; agitation felts the wool.
• Do not tumble dry.
• Do not bleach.
• Do not wring — press the water out gently and reshape while damp.
• Dry flat, away from radiators and direct sun, so the sleeves do not stretch out of shape.
• Iron only on low with a pressing cloth if truly necessary; high heat damages the polyester.
• Store folded flat so the knit keeps its cylinder.

LA HAINE INSIDE US. Spray-treated wool blend knit. Made in Italy.