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General Birdlocked description

This patented sheath, with its unique design, is produced using materials used in medical surgery, making it fully hypoallergenic, while its shape is perfectly suited to the male physique.

It is unbreakable but, in case of emergency, it may be cut with simple scissors. It is so comfortable you will tend to forget you are wearing a chastity device; thanks to its numerous air holes, you can wear the sheath every day, go to the bathroom, wash yourself, in perfect hygiene, without ever having to remove it. It is easy to put on but, once it is closed, it guarantees 100% security.

Technical specifications:

• Highly tear-resistant
• Unbreakable and will not get damaged
• Contains no toxic material or heavy metals
• Fully water-resistant
• Highly resistant against chemical agents

Comfort and security:

• Easy to put on (like a cockring). See under "Instructions"
• No pain during nocturnal erections
• Air holes, perfectly suited to wear it for extended periods
• Both penis and sheath are easy to clean without having to remove the sheath
• Hypoallergenic product which provokes no irritation, even over prolonged periods
• The material may malleable, but its innovating locking mechanism stops the penis from leaving the sheath
• No sheath deformation during erections (4-mm sheath thickness)
• Once the proper ring setting has been found, removing the penis becomes impossible
• Very discreet, even invisible under clothes
• The strap may be cut easily if removal becomes urgent

Older models of chastity sheaths were difficult to wash and often uncomfortable; those made of plastic were fragile, representing significant risk to the wearer if they broke, and their closing mechanisms were often painful after several hours of use.

The new “Birdlocked” chastity sheath has all the advantages: it is both easy to wash and hypoallergenic. Its solid closing mechanism leaves the wearer in a flexible yet fully secure device, very comfortable to wear as it fits the male anatomy perfectly. The sheath may be crushed yet remain unbroken. And regardless of what you wear, it remains completely invisible under any clothes.

Size determination

How to select the ring diameter?

Most customers use a ring with a 45-mm diameter. However, other diameters are available. The following is a 4-step procedure to help you determine the right diameter for you.

• Take a string some 30 cm (12 inches) long, and place it around you’re your scrotum and penis. Remember not to use elastic string, as this would skew the measurements.
• Make a double knot: the string should be tight enough to make it difficult for you to slip a finger under it, yet not so strong as to cut off the blood flow. Leave the string on for 5 minutes,
• to make sure it is the right diameter. Cut the string with a pair of scissors, taking care not to hurt yourself while doing so.
• Measure the length of the string, and consult the following table to learn which is the right diameter for you.

Length in mm Length in inches Size Birdlocked 

119 mm to 132 mm  4.68 to 5.2 inches  40 mm

133 mm to 148 mm  5.21 to 5.82 inches  45  mm

149 mm to 163 mm  5.83 to 6.41 inches  50 mm

164 mm to 169 mm 6.45 to 6.65 inches  53 mm

Alternatively, if you have worn a CB-2000, CB-3000, CB-6000, or Curve, and know your ring size, the following would be a rough equivalent chart

If you have worn a 1-1/2" ring, get the 40mm ring size
If you have worn a 1-5/8" ring, get the 40mm or 45mm ring size
If you have worn a 1-3/4" ring, get the 45mm ring size
If you have worn a 1-7/8" or larger ring, get the 50mm size

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