★★★★★ 5
Cool
Size: XX-Large, Color: Black
Warm, long, goes almost to ny ankles and i am tall
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Reviewed in the United States on March 17, 2026
Kalmbach Optiferm XLOpti Ferm XL Yeast is a combination of Saccharomyces cerevisiae Fermentation Solubles dried to preserve the yeast factors, B vitamins and other fermentation products, combined with active dry Saccharomyces cerevisiae (CNCM I 1077). Use to maximize performance in all species of livestock, poultry and game animals.
Quick Dispatch:
Your Kalmbach Optiferm XL orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Kalmbach Optiferm XL ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.8 ★★★★★
Based on 1935 reviews
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Product Reviews
★★★★★ 1
Actually violet color and looks nothing like picture
Size: Large, Color: Red
Bait-n-switch. What arrives looks nothing like the photo. Its purple/pink and a misshapen ladies coat. Really low quality. And why they make them 90% polyester is crazy - just waiting to explode in flames!
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Reviewed in the United States on December 15, 2025
★★★★★ 5
Better than expected
Size: Large, Color: Black
Nice weight and kept me warm in 20 degree weather. I recommend adding a scarf for your neck line but this coat gives a nice clean but dramatic look.
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Reviewed in the United States on February 2, 2026
★★★★★ 5
Great coat
Size: Medium, Color: Black
Great fit, very warm, perfect material
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Reviewed in the United States on March 25, 2026
★★★★★ 5
Great coat
Size: Large, Color: Black
Sizing runs true, the quality appears to be good. I ordered the black and the color is what I expected, it’s the perfect length. The weight and thickness is perfect for temperatures in the low 30’s and up. The coat is perfect for Business wear and casual wear
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Reviewed in the United States on January 28, 2026
