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Ready to handle whatever winter dishes out, this jacket features water-resistant fabric and 150g of Microtemp insulation.

Boys' Lost Brook™ Jacket


https://www.columbia.com/boys-lost-brook-jacket-1743231.html 1743231
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Style# 1743231
Uses Travel


The Boy’s Lost Brook jacket can handle just about anything winter dishes out. Made with a water-resistant fabric and fortified with 150g of Microtemp insulation to keep him warm, dry, and happy while the weather rages.

  • Omni-Heat™ thermal reflective
  • OUTGROWN™ grow system
  • Water resistant fabric
  • Insulated, 150gsm
  • Attached, adjustable storm hood
  • Chest Pocket
  • Adjustable cuffs. Comfort cuffs
  • Center Back Length: 23.5"
  • Imported
  • Uses: Travel
  • Style# 1743231

  • Shell: 100% nylon
  • Lining: Omni-Heat™ Reflective Microtex Light 100% polyester
  • Insulation: 150g Microtemp XF II 100% polyester
Omni-Heat™ Reflective
Thermal Reflective Warmth

Technology Videos

Play youtube video about Omni-Heat Reflective (tm)
Omni-Heat™ Reflective
Magic in a littlesilver dot.
Breathable material with little silver dots that reflect body heat.


Boys' Lost Brook™ Jacket is rated 4.7 out of 5 by 16.
Rated 5 out of 5 by from Very nice jacket I am very impressed by the quality of this jacket. I have a very busy 9 year old who will be wearing this next winter. He said that he likes that it is not to bulky.
Date published: 2018-04-23
Rated 4 out of 5 by from Quality Light weighted and comfortable.
Date published: 2018-03-27
Rated 5 out of 5 by from Great I like this jacket very much. It looks so smart.
Date published: 2018-03-09
Rated 5 out of 5 by from Love it I love this jacket. It is light and well made.
Date published: 2018-03-03
Rated 5 out of 5 by from FANTASTIC Love the color block-love the functions-love the feAtures-loved by my son- SON TESTED SON APPROVED!
Date published: 2018-03-02
Rated 5 out of 5 by from Perfect Perfect coat. Durable. Nice color. Lightweight and WARM WARM WARM and breathable. You will love it too.
Date published: 2018-02-26
Rated 4 out of 5 by from Nice but runs big This is an nice looking jacket not very warm and a little big. Overall a decent coat.
Date published: 2018-02-17
Rated 4 out of 5 by from Cute and functional Th coat came quickly and is super cute. I like that it looks like a coat that you could wear with nice clothes as well as serving a purpose for the outdoors. I bought this for my son for next year while it was on sale and I am excited for him to be able to use it! I hope it’s as warm as other reviewers have said because we get some tough winters in upstate NY!
Date published: 2018-02-10
Rated 5 out of 5 by from BOY’S LOST BROOK™ JACKET I bought this jacket for my nephew and it is super warm and not to big and bulky! He loves it!
Date published: 2018-02-09
Rated 4 out of 5 by from Warm and cozy My son loves his new coat and I love that it will grow with him and that it has the warm insulation in it. Only giving 4stars because the fabric of the Columbia coats seems a little less durable than others I’ve gotten. My son had this coat for three days and went sledding and got a small hole in it where it scraped the ice on a seam (he was belly sledding and I think the bottom edge just dragged). Easy for me to patch but I wish they made the fabric thicker and more durable on the “high friction” spots like the elbows, knees, cuffs, and around the zippers. Otherwise I’m pleased with it.
Date published: 2018-02-09
Rated 5 out of 5 by from Good jacket! I bought this for my son. He loves this jacket. It’s not only light but also warm.
Date published: 2018-02-08
Rated 5 out of 5 by from Great Winter Jacket Lightweight but very warm jacket that is perfect for milder winters where it's still freezing but no snow. Lots of extra pockets and love the color patchwork with the blue.
Date published: 2018-02-07
Rated 5 out of 5 by from What a Super-Warm Coat!!! * I just noticed on the proof that this review has a star by it that says "Incentivized". I would not lie about a company or a product. My review was not promised to be positive. They just requested I write it for a chance to win something- no biggie or anything unethical here!!! So, on with it: We had a very cold wind chill in Chicago and my son said he was hot in this coat! He will not need to be layering so much with this one, just grab and go. Yay! It's a great price for a very warm coat that is not bulky. The coat is cuter on. I wasn't really sure I liked it when I ordered it but we needed it and it looks really great!!! The pockets are a great two entry bonus. You can store stuff in the top entrance and rest your hands in the side slots---super!!! Thanks, Columbia! :)
Date published: 2018-02-07
Rated 5 out of 5 by from Just right I bought this for my seven-year-old son he wears a size 10 in this cold fix him just right
Date published: 2018-02-06
Rated 4 out of 5 by from Good looking jacket Looks GREAT and is very warm for Wisconsin winter weather. Extended sleeves are a bonus.
Date published: 2018-02-05
Rated 5 out of 5 by from Warm Coat This coat keeps you warm and you don’t have To wear a sweater underneath. It perfect for cold weather.
Date published: 2018-02-04
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Size & Fit Guide

Size Chart

Girls' Sizes (inches)

Size Range XXS
Chest 23 25 27 30 33 36
Waist 21½ 22 23 25 27 29
Hip 24 26 29 32 35 38
Inseam 18¾ 21¼ 22½ 26½ 29½ 32½
Sleeve Length 20 22½ 24 27 30 33

Boys' Sizes (inches)

Size Range XXS
Chest 23 25 26½ 29½ 32½ 35½
Waist 21½ 22 23½ 25½ 27½ 29½
Hip 24 26 27 30 33 36
Inseam 18¾ 21¼ 22 26 29 30
Sleeve Length 20 22½ 24 27 30 33

Toddler Sizes (inches)

Size Range 2T 3T 4T
Chest 20 21 22
Waist 19½ 20½ 21½
Hip 21 22 23
Inseam 13 15¼ 17½
Sleeve Length 16 17½ 19

Infant Sizes (inches)

Size Range 6mos. 12mos. 18mos. 24mos.
Chest 17½ 18½ 19½ 20½
Waist 18 19 20 21
Hip 18 19 20 21
Inseam 11 12½ 15
Sleeve Length 12½ 13½ 14½ 16½

How to Measure

Columbia Fit Guide

How to Measure

  • Fold up at dotted line.
  • Place against a wall or other 90 degree surface.

    Place heel against fold/wall on flat level surface.
  • Mark the end of the longest toe with a pen or pencil.
  • Measure both feet and use the larger measurement.
  • Read measurement and compare to size chart.
  • When comparing on the size chart, determine the closest larger measurement and use that number to determine your shoe size for your country’s shoe measurement standard.

Shipping & Returns

Shipping & Returns

Shipping Information

Shipping Method Rate Expected Delivery Time
Ground $6.00 3-7 Business Days
2-Day Air $12.00 2-3 Business Days
Overnight $19.00 1-2 Business Days
Free Standard Shipping

Return Policy

Returns are accepted within 60 days of the purchase date online or in-store. Your apparel must be in original and unworn condition, with tags still attached. Footwear returns must also include the original box.

Still Have Questions

See our Customer Service section for more details. Visit Customer Service

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