Are they very revealing? I've read that some Jammers are so thin that "nothing is left to the imagination". I was hoping these are relatively discreet

No, you can't see through them at all. But the jammers are tight.

Having trouble figuring out sizes. my son is 11, 55 in tall wt approx 90 lb. Thoughts?

The sizing is by waist size. Your best fit will be measuring his waist and ordering the nearest size. My 11 yr old is 85 lbs and very lean and wears a 28.

Does this item have a jock suport sewn in? Tried others that don't, and it looks like a camel toe.

No I can’t say I’ve ever seen a men’s swim suit with jock support sewn in.

My husband has been wearing these (this brand) for years and he said "They are awesome and no they never fade!"

Mens Durafast One Jammer Solid Training Athletic Swimsuit Briefs

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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฿4583

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Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🏊‍♂️ Swim Strong, Stay Sharp, Own the Pool

FREEDOM TO PERFORM - 4-way stretch fabric delivers unrestricted movement, perfect for the competitive swimmer who demands peak performance.
CHAMPIONS CHOICE - Endorsed by the spirit of TYR, the Norse god of warriors, this jammer embodies courage, resilience, and victory in every stroke.
SUN SAFE CHLORINE PROOF - UPF 50+ protection and fade-resistant colors keep you covered and looking sharp, poolside or beachside.
PRECISION FIT ABOVE THE KNEE - Athletic compression fit with adjustable drawcord waist offers secure, comfortable coverage without weighing you down.
BUILT TO LAST SWIM AFTER SWIM - Crafted from 100% polyester that’s 20x more durable than standard swimwear, ensuring your investment outlasts every training session.

The TYR Men's Durafast One Jammer is a high-performance athletic swimsuit designed for durability and comfort. Made from 100% polyester that is 20 times stronger than traditional swimwear, it features 4-way stretch for maximum mobility, UPF 50+ sun protection, and a compression fit with an adjustable drawcord waist. Ideal for serious swimmers seeking long-lasting, fade-resistant swimwear that supports intense training in both pool and open water environments.

Specifications

ASIN	B001M9KYL8
ASIN	B0BMDXQ7L6
Age Range Description	Adult
Apparel Closure Type	Pull On
Apparel Fabric Stretch	High Stretch
Apparel Fabric Weight Class	Lightweight
Back Style	Closed Back
Best Sellers Rank	#46,503 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #14 in Men's Athletic Swimwear Jammers
Brand Name	TYR
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (2,152)
Date First Available	April 9, 2011
Department	mens
Fabric Type	100% Polyester
Fit Type	Athletic
Fit to Size Sentiment	Neutral to Positive
Garment Size Country	United States
Global Trade Identification Number	00036702157315
Item Type Name	Swim Trunks
Item Weight	4 ounces
Item model number	SLAP7A
Life Event	Swimming
Lining Description	Polyester
Manufacturer	TYR
Manufacturer	TYR
Manufacturer Part Number	SDUR7A
Material Type	Polyester
Number of Items	1
Pattern	Solid
Product Benefits	Durable, chlorine resistant, and sun protective.
Product Care Instructions	Hand Wash Only
Rise Style	Mid Rise
Size	32
Sleeve Length Description	Sleeveless
Sleeve Type	Sleeveless
Special Size Type	Standard
Strap Type	Adjustable
Style Name	Durafast One Jammer Swimsuit
Style Number	SDUR7A
Swimwear Bottom Form	Jammer
Swimwear Form Type	Bottom Only
UPC	036702157315
Ultraviolet Protection Factor	UPF 50
Unit Count	1 Count
Waist Size	32 Inches

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