12G Lightweight Merino Wool Mockneck
Material & Craft: 100% Australian Merino, carefully knitted in Osaka, Japan.
Texture: Smooth, comfortable touch with reliable natural warmth.
Silhouette: Classic fit
Crafted in Osaka, Japan Since 1966:
Every garment is knitted, inspected, and hand-finished by our artisans under one roof. This is the essence of Japanese Monozukuri (craftsmanship)—where uncompromising quality meets timeless design.
Our knitwear features a clean, tailored silhouette designed to prevent bunching or sagging. As a result, our fits run slightly trimmer than traditional American brands.
US Size Comparison
- US S (Polo RL / J.Crew) ➔ Mooncastle M
- US M (Polo RL / J.Crew) ➔ Mooncastle L (Tailored) or XL (Relaxed)
- US L (Polo RL / J.Crew) ➔ Mooncastle XXL
Quick Tip: If you are between sizes or prefer a more relaxed fit, we highly recommend sizing up one full size.
Ordered the wrong size? Return with a prepaid UPS label, and we’ll send the replacement from our US warehouse.
How to Wash
Designed for everyday convenience, this Merino wool knit is machine washable.
- Machine Wash: Place the garment in a laundry net and wash on a strictly cold "Wool," "Delicate," or "Hand Wash" cycle using a neutral (wool-safe) detergent.
- Hand Wash (Alternative): If you prefer, gently press and wash by hand in cold water. Avoid twisting or wringing the fabric.
- Reshape While Wet: After washing, gently smooth out any wrinkles and carefully reshape the garment to its original dimensions while it is still damp.
How to Dry & Store
- Dry Flat: To maintain the flawless silhouette and prevent stretching, always dry flat in the shade.
- No Tumble Dry: Please avoid using a dryer entirely, as heat and friction will cause natural wool to shrink and felt.
- Storage: We strongly recommend folding your knitwear for storage. Hanging wool on a hanger will stretch the fabric and distort the shoulders over time.
Important: A Note on Shrinkage & Fit
- Natural Shrinkage: Due to the nature of natural wool fibers, you may experience slight shrinkage after the first wash.
- The "Live" Fit: The knit might feel slightly snug immediately after washing. However, as you wear it, the resilient Merino fibers will naturally relax, conform to your body, and return to a comfortable fit.
- Sizing Tip: If you prefer a more relaxed or loose fit from the start, we recommend purchasing one size up.
Enjoy authentic Japanese craftsmanship without the international wait.
Every piece is knitted in our Osaka factory, but dispatched directly from our US warehouse.
- Fast & Free: Packed within 1-2 business days and delivered via UPS (3-6 days) at no extra cost.
- No Hidden Fees: Because it ships domestically, you’ll never face surprise import duties or customs delays.
We want you to feel as confident wearing our knitwear as we do making it. If the fit isn’t perfect, returning or exchanging it is completely hassle-free.
- 100% Free (No Shipping to Japan): We provide a prepaid UPS return label. You pay zero return postage, and everything is handled directly through our US warehouse.
- 30-Day Window: Take your time. You have 30 days from delivery to return or exchange any unworn, unwashed item with its original tags.
- Fast & Seamless Exchanges: Need a different size? Just email us. Once your return drops at our US facility, we’ll immediately ship your replacement from our local stock.
Email : support@moon-castle.jp
*Note: Sale items are final sale.
Crafted in Osaka: A Winter Essential
Born from a focus on enduring style and everyday comfort, this 12-gauge wool mock neck is a versatile staple for your winter wardrobe.
(Model is 180cm / 5'11" and wears size L)
Featuring a soft touch and a clean drape, it works beautifully on its own or layered smoothly under your favorite jackets and cardigans.
High-Quality Australian Merino
We source high-quality Australian Merino wool, known for its fine, supple, and resilient fibers. This provides a clean, natural luster that elevates the garment. Importantly, this grade of wool significantly reduces the itchiness often associated with winter knits, offering a smooth and comfortable feel against the skin.
(Model is 180cm / 5'11" and wears size L)
Monozukuri: The Art of the Perfect Knit
Carefully sourced materials are brought to life through careful craftsmanship. At our Osaka factory, we use a 12-gauge flat stitch to create a uniform, smooth fabric.
This dense knit structure provides a substantial feel and reliable heat retention, making it an ideal layer for the colder months.
Calculated Details for a Flawless Silhouette
Careful attention to detail ensures a clean silhouette that holds its shape wear after wear:
The Mock Neck: Designed with a balanced height—neither too low nor restrictive. It frames the neck neatly and sits comfortably against the back collar of a tailored jacket.
The Sleeves: Finished with ribbed cuffs that offer a secure, settled fit without restricting movement.
The Hem: A moderately tapered ribbed hem allows the sweater to sit cleanly at the waist, preventing bunching and ensuring a neat appearance.
Choose options