A neck weight in freediving or apnea diving typically weighs between 1-3 kilograms (2.2-6.6 pounds). The purpose of the neck weight is to help the diver achieve neutral buoyancy in the water, allowing them to descend and ascend more easily without expending excess energy. The weight is positioned around the neck to help the diver maintain a streamlined body position and reduce the effort required to equalize the ears. The specific weight used can vary depending on the individual diver's body composition and diving conditions. **

It is not recommended to wear contact lenses while freediving. The pressure changes that occur when diving deep underwater can cause discomfort and potential damage to the eyes if wearing contact lenses. Additionally, there is a risk of losing the lenses in the water, which can be dangerous for both the wearer and the marine environment. It is best to consult with an eye care professional for advice on the safest options for vision correction while freediving. **

Packing air while freediving can be both dangerous and beneficial, depending on how it is done. When done incorrectly or excessively, packing air can lead to overexpansion of the lungs, which can cause lung barotrauma or arterial gas embolism, both of which are serious and potentially life-threatening conditions. However, when done properly and in moderation, packing air can increase lung volume and improve breath-holding capacity, allowing freedivers to stay underwater for longer periods of time. It is important for freedivers to receive proper training and guidance on how to safely and effectively pack air to minimize the risks associated with this technique. **

Diving goggles are not allowed in the swimming pool because they are designed for use in deep water and can obstruct peripheral vision, increasing the risk of collisions with other swimmers. Additionally, diving goggles are not necessary for swimming laps or recreational swimming in a pool with clear water. The use of diving goggles in a swimming pool can also create a safety hazard if the wearer dives into shallow water thinking it is deeper than it actually is. **

Using a diving mask instead of swimming goggles can provide a wider field of vision and better visibility underwater. Diving masks are designed to create a watertight seal around the eyes and nose, preventing water from entering. They also typically have a nose pocket for equalizing pressure while diving. However, diving masks may be bulkier and less streamlined than swimming goggles, which could affect comfort and performance while swimming laps. **

No, I do not wear swimwear outside of the beach. I believe that swimwear is designed for specific activities such as swimming and sunbathing, and I prefer to wear appropriate clothing for other outdoor activities. Additionally, I feel more comfortable and confident in regular clothing when I am not at the beach or pool. **

At a nudist beach, swimwear is typically not worn as the whole point of the beach is to be clothing-optional. People at nudist beaches usually go swimming and sunbathing completely nude. Some may choose to wear a hat, sunglasses, or other accessories for sun protection, but traditional swimwear is not typically seen at nudist beaches. The atmosphere is one of body acceptance and freedom, and people are encouraged to be comfortable in their own skin. **

The appropriate swimwear for the swimming pool is a swimsuit or swim trunks. Swimsuits should be made of a material that is suitable for swimming and should provide adequate coverage. It is important to choose swimwear that is comfortable and allows for ease of movement in the water. Additionally, it is important to follow any specific dress code or guidelines set by the swimming pool facility. **